imageview

问题 I have an ImageView which has a transparent drawable with a circle at the center like (http://wallpaperswide.com/circle_outline-wallpapers.html). Just that the circle is red, and the surrounding are not coloured but are transparent, it is a .png image. So now I will implement Canvas.ondraw() , and when while tracing the user goes outside the circle, the drawing should restart. The doubt is: 1. How do I detect the boundaries of this image without hardcoding. 2. How do I detect that the user

问题 Loading different size of images into ImageView using Glide Library. But not sure why glide fails to handle the memory consumption, recycle and reuse it. Gradle: api 'com.github.bumptech.glide:glide:4.3.0' Usage: @BindingAdapter({"imageUrl"}) public static void imageUrl(ImageView view, String imageUrl) { try { if (imageUrl!=null) { Glide.with(view.getContext()).load(imageUrl).into(view); } } catch (Exception e) { e.printStackTrace(); } } Crash Log: 04-23 13:19:34.390 4758-4758/xx.xx.xxxE

问题 I have an app that connects to an external printer device and I need to take some user data and dynamically make an image and print it. The printer API requires a bitmap as input for printing. Note that I never want to draw the programmatically created image to the screen; the generation and printing of the image have no visible UI, it happens in the background. So far I've considered doing it one of the following ways: 1) Make a canvas, never call the draw functions, translate it to a bitmap

问题 In Android using ImageView and Matrix, I want to scale an image to fit in the display area. Then using pinch, a user can zoom the image. Using setScaleType(ImageView.ScaleType.FIT_CENTER) I can fit my image in display area. But when I use setScaleType(ImageView.ScaleType.MATRIX) , to start zooming the image, the image gets reset to default size. So my question is how to find a scale matrix which will give same effect as setScaleType(ImageView.ScaleType.FIT_CENTER) . 回答1: You need to use

问题 Currently nothing happens when I touch a button which takes me to another VC which is supposed to get an image from firebase and then display it in an image view on the VC after pressing a button called, loadImageFunc What is wrong in my code? I am getting no errors. It just does not work. import UIKit import FirebaseStorage import FirebaseDatabase import FirebaseAuth import Firebase ​ class PhaseOneViewController: UIViewController { @IBOutlet weak var p1ImageView: UIImageView! ​ @IBAction

问题 Currently nothing happens when I touch a button which takes me to another VC which is supposed to get an image from firebase and then display it in an image view on the VC after pressing a button called, loadImageFunc What is wrong in my code? I am getting no errors. It just does not work. import UIKit import FirebaseStorage import FirebaseDatabase import FirebaseAuth import Firebase ​ class PhaseOneViewController: UIViewController { @IBOutlet weak var p1ImageView: UIImageView! ​ @IBAction

问题 Given a simple RelativeLayout like this: <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#0fffff"> <ImageView android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="center" android:adjustViewBounds="true" android:scaleType="fitCenter" android:src="@drawable/img001" /> </RelativeLayout> the left/top spacing between the layout border and the image border depends on the W/H ratio of the image being

问题 I'm new to Android, and I've finished a game which was meant to feature pixel art. I was going to scale up my images (imageviews and bitmaps drawn to canvas) from small pixelated png files. The thing is, I could not seem to disable anti-aliasing whatever method I tried. The image was always blurred. All my images are in one 'drawable' folder. I tried android:antialias="false" within the ImageView in the xml. Tried the method described here: http://www.41post.com/4241/programming/android

问题 I am trying to do something in an if-statement, this works in every version of android (16 or higher because of the getDrawable) except Android L (tested on latest). The code is the following: if (item.getIcon().getConstantState().equals(getResources().getDrawable(R.drawable.add_to_fav_normal).getConstantState()) Any help/hints or explanation would be appreciated! 回答1: Use item.getContext().getDrawable(int) or the equivalent ContextCompat method. Starting in API 21, all framework widgets that

问题 I have ImageView in my activity with the following properties i have innitialized the imageview and also set OnClickListener on ImageView , but when i click on Imageview for the first time, onlick event doesnot work but when i click on Imageview for the second time it works <ImageView android:clickable="true" android:focusable="false" android:id="@+id/switchIcon" android:layout_width="50dp" android:layout_height="45dp" android:layout_alignParentRight="true" android:layout_below="@+id/title"